The ep, slated to air this fall, finds Castle and Beckett investigating a death at a science fiction convention, thrusting them into a “world of egotistic celebrities, diehard fans and enough drama for two galaxies,” previews series creator Andrew Marlowe, who first floated the possibility of a Con-inspired episode to TVLine earlier this month.

This marks Frakes’ second turn behind the Castle cameras. He previously helmed the Season 2 outing, “Kill the Messenger.”